// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

package org.apache.doris.qe;


import org.apache.doris.common.Status;

import org.junit.Assert;
import org.junit.Test;

import java.util.function.Consumer;

public class LimitUtilsTest {

    private static int res = 0;

    @Test
    public void testUpperBound() {
        Consumer<Status> cancelFunc = batch -> res = 666;
        RowBatch rowBatch = new RowBatch();
        rowBatch.setEos(false);
        // - no limit
        Assert.assertFalse(LimitUtils.cancelIfReachLimit(rowBatch, 0, 10, cancelFunc));
        Assert.assertFalse(rowBatch.isEos());
        Assert.assertEquals(0, res);

        // - not reach limit
        Assert.assertFalse(LimitUtils.cancelIfReachLimit(rowBatch, 10, 1, cancelFunc));
        Assert.assertFalse(rowBatch.isEos());
        Assert.assertEquals(0, res);

        // - reach limit
        Assert.assertTrue(LimitUtils.cancelIfReachLimit(rowBatch, 10, 10, cancelFunc));
        Assert.assertTrue(rowBatch.isEos());
        Assert.assertEquals(666, res);

        // - reach limit
        res = 0;
        rowBatch.setEos(false);
        Assert.assertTrue(LimitUtils.cancelIfReachLimit(rowBatch, 10, 100, cancelFunc));
        Assert.assertTrue(rowBatch.isEos());
        Assert.assertEquals(666, res);
    }
}
